Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
chinh can » chinh ban, chinh cau, chinh ngan
nhung don » nhung van, nhung bo
hang cong » dang cong, hang nong, bang cong
chinh ca » chinh ta, chinh va, chinh tai
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - hanh ((chinh can) OR (chinh ca)) ((nhung don) or (hang cong)) tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((chinh can) OR (chinh ca)) ((nhung don) OR (hang cong)) tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((chinh can) OR (chinh ca)) ((nhung don) or (hang cong)) tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((chinh can) OR (chinh ca)) ((nhung don) or (hang cong)) tinh toan ban*.